Donald J Hayes, David B Wallace, Donald J Verlee, Kenneth R Houseman: Apparatus and process for reagent fluid dispensing and printing. Abbott Laboratories, Thomas D Brainard, Rodney A Daniel, Edward H Gorman Jr, October 31, 1989: US04877745 (140 worldwide citation)

This invention relates to a system for printing and dispensing chemical reagents in precisely controlled volumes onto a medium at a precisely controlled location. A jetting tube, comprising an orifice at one end and a fluid receiving aperture at the other end, is concentrically mounted within a cyli ...

Robert W Jaekel, Donald J Verlee, John L Vcelka: Two-way valve for blood analyzing apparatus. Abbott Laboratories, Willian Brinks Olds Hofer Gilson & Lione, June 7, 1988: US04749658 (17 worldwide citation)

Apparatus and method for analyzing a biological material such as blood serum to determine whether a substance indicative of disease is present. The apparatus utilizes a two-way valve construction for rinsing a cartridge containing the material under analysis at various operating stations.

Enrique Martinez II, Denis Callewaert, Donald J VerLee: Method and apparatus for the identification of aldehydes. Oxford Biomedical Research, Greer Burns & Crain, September 30, 2014: US08846405 (1 worldwide citation)

A method for detecting the presence of an aldehyde in a sample comprises steps of exposing the sample at room temperature to a test medium to catalyze the formation of optically detectable quantities of a product within a time period of no more than 60 minutes and without applying any external heat ...